/* === AI Tools - Custom Tailwind-like CSS === */
/* Layout */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.gap-3 { gap: 0.75rem; }
.gap-4 { gap: 1rem; }
.gap-5 { gap: 1.25rem; }
.space-y-3 > * + * { margin-top: 0.75rem; }
.space-y-5 > * + * { margin-top: 1.25rem; }
.space-x-1 > * + * { margin-left: 0.25rem; }
.space-x-2 > * + * { margin-left: 0.5rem; }

/* Sizing */
.w-full { width: 100%; }
.w-3 { width: 0.75rem; }
.w-3\.5 { width: 0.875rem; }
.w-4 { width: 1rem; }
.w-5 { width: 1.25rem; }
.w-6 { width: 1.5rem; }
.w-14 { width: 3.5rem; }
.h-3 { height: 0.75rem; }
.h-3\.5 { height: 0.875rem; }
.h-4 { height: 1rem; }
.h-5 { height: 1.25rem; }
.h-6 { height: 1.5rem; }
.h-14 { height: 3.5rem; }
.h-auto { height: auto; }
.min-h-\[32px\] { min-height: 32px; }
.min-h-screen { min-height: 100vh; }
.max-w-full { max-width: 100%; }
.max-w-5xl { max-width: 64rem; }
.max-w-6xl { max-width: 72rem; }
.max-w-xl { max-width: 36rem; }
.max-w-sm { max-width: 24rem; }
.max-h-\[500px\] { max-height: 500px; }
.max-h-\[60vh\] { max-height: 60vh; }

/* Spacing */
.p-0\.5 { padding: 0.125rem; }
.p-3 { padding: 0.75rem; }
.p-4 { padding: 1rem; }
.p-5 { padding: 1.25rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-2 { padding-left: 0.5rem; padding-right: 0.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.px-6 { padding-left: 1.5rem; padding-right: 1.5rem; }
.px-8 { padding-left: 2rem; padding-right: 2rem; }
.py-0\.5 { padding-top: 0.125rem; padding-bottom: 0.125rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.py-2\.5 { padding-top: 0.625rem; padding-bottom: 0.625rem; }
.py-3 { padding-top: 0.75rem; padding-bottom: 0.75rem; }
.py-6 { padding-top: 1.5rem; padding-bottom: 1.5rem; }
.py-8 { padding-top: 2rem; padding-bottom: 2rem; }
.px-14 { padding-left: 3.5rem; padding-right: 3.5rem; }
.px-12 { padding-left: 3rem; padding-right: 3rem; }
.pt-4 { padding-top: 1rem; }
.pb-4 { padding-bottom: 1rem; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 0.75rem; }
.mb-4 { margin-bottom: 1rem; }
.mt-0\.5 { margin-top: 0.125rem; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Typography */
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-base { font-size: 1rem; line-height: 1.5rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-xl { font-size: 1.25rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.text-5xl { font-size: 3rem; line-height: 1; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.text-center { text-align: center; }
.text-left { text-align: left; }
.leading-relaxed { line-height: 1.625; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.whitespace-pre-wrap { white-space: pre-wrap; }
.break-words { overflow-wrap: break-word; }

/* Colors - Brand */
.text-brand-100 { color: #dbeafe; }
.text-brand-500 { color: #3b82f6; }
.text-brand-600 { color: #2563eb; }
.text-brand-700 { color: #1d4ed8; }
.bg-brand-50 { background-color: #eff6ff; }
.bg-brand-100 { background-color: #dbeafe; }
.bg-brand-500 { background-color: #3b82f6; }
.bg-brand-600 { background-color: #2563eb; }
.border-brand-100 { border-color: #dbeafe; }
.border-brand-200 { border-color: #bfdbfe; }
.border-brand-400 { border-color: #60a5fa; }
.hover\:bg-brand-700:hover { background-color: #1d4ed8; }
.hover\:text-brand-600:hover { color: #2563eb; }

/* Colors - Gray */
.text-gray-300 { color: #d1d5db; }
.text-gray-400 { color: #9ca3af; }
.text-gray-500 { color: #6b7280; }
.text-gray-600 { color: #4b5563; }
.text-gray-700 { color: #374151; }
.text-gray-800 { color: #1f2937; }
.bg-gray-50 { background-color: #f9fafb; }
.bg-gray-100 { background-color: #f3f4f6; }
.bg-gray-100\/50 { background-color: rgba(243,244,246,0.5); }
.bg-gray-800 { background-color: #1f2937; }
.border-gray-100 { border-color: #f3f4f6; }
.border-gray-200 { border-color: #e5e7eb; }
.border-gray-300 { border-color: #d1d5db; }
.hover\:text-gray-300:hover { color: #d1d5db; }
.hover\:text-gray-600:hover { color: #4b5563; }

/* Colors - Others */
.text-white { color: #fff; }
.text-white\/80 { color: rgba(255,255,255,0.8); }
.text-red-400 { color: #f87171; }
.text-red-600 { color: #dc2626; }
.text-blue-600 { color: #2563eb; }
.text-orange-500 { color: #f97316; }
.bg-white { background-color: #fff; }
.bg-blue-50 { background-color: #eff6ff; }
.bg-red-50 { background-color: #fef2f2; }
.bg-red-400 { background-color: #f87171; }
.bg-green-600 { background-color: #16a34a; }
.bg-orange-100 { background-color: #fff7ed; }
.border-blue-200 { border-color: #bfdbfe; }
.border-red-200 { border-color: #fecaca; }
.hover\:bg-blue-100:hover { background-color: #dbeafe; }
.hover\:bg-red-100:hover { background-color: #fee2e2; }
.hover\:bg-red-600:hover { background-color: #dc2626; }
.hover\:bg-green-700:hover { background-color: #15803d; }

/* Gradients */
.bg-gradient-to-br { background-image: linear-gradient(to bottom right, var(--tw-gradient-stops)); }
.bg-gradient-to-r { background-image: linear-gradient(to right, var(--tw-gradient-stops)); }
.from-brand-500 { --tw-gradient-from: #3b82f6; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(59,130,246,0)); }
.from-brand-600 { --tw-gradient-from: #2563eb; --tw-gradient-stops: var(--tw-gradient-from), var(--tw-gradient-to, rgba(37,99,235,0)); }
.via-brand-700 { --tw-gradient-stops: var(--tw-gradient-from), #1d4ed8, var(--tw-gradient-to, rgba(29,78,168,0)); }
.to-brand-900 { --tw-gradient-to: #1e3a8a; }
.to-purple-600 { --tw-gradient-to: #9333ea; }

/* Borders */
.border { border-width: 1px; }
.border-2 { border-width: 2px; }
.border-t { border-top-width: 1px; }
.border-b { border-bottom-width: 1px; }
.border-dashed { border-style: dashed; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-md { border-radius: 0.375rem; }
.rounded-full { border-radius: 9999px; }
.rounded-2xl { border-radius: 1rem; }

/* Effects */
.shadow-sm { box-shadow: 0 1px 2px 0 rgba(0,0,0,0.05); }
.shadow { box-shadow: 0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px -1px rgba(0,0,0,0.1); }
.shadow-md { box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1); }
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25); }
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-y-auto { overflow-y: auto; }
.select-none { user-select: none; }
.opacity-50 { opacity: 0.5; }
.opacity-0 { opacity: 0; }
.opacity-100 { opacity: 1; }

/* Transitions */
.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4,0,0.2,1); transition-duration: 150ms; }
.transition-colors { transition-property: color, background-color, border-color, text-decoration-color, fill, stroke; transition-timing-function: cubic-bezier(0.4,0,0.2,1); transition-duration: 150ms; }
.duration-200 { transition-duration: 200ms; }
.ease-out { transition-timing-function: cubic-bezier(0,0,0.2,1); }

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }
.top-0 { top: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }
.bottom-0 { bottom: 0; }
.z-10 { z-index: 10; }
.z-50 { z-index: 50; }
.inset-0 { inset: 0; }

/* Visibility */
.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }
.inline-flex { display: inline-flex; }
.inline { display: inline; }

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-crosshair { cursor: crosshair; }
.cursor-not-allowed { cursor: not-allowed; }

/* Misc */
.list-none { list-style: none; }
.object-contain { object-fit: contain; }
.object-cover { object-fit: cover; }
.resize-none { resize: none; }
.flex-shrink-0 { flex-shrink: 0; }
.grow { flex-grow: 1; }

/* Custom */
.btn-scale:active { transform: scale(.96); }
.loading-spinner { width:20px; height:20px; border:2px solid rgba(255,255,255,.3); border-top-color:#fff; border-radius:50%; display:inline-block; animation:spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.fade-in { animation:fadeIn .4s ease-out; }
@keyframes fadeIn { from { opacity:0; transform:translateY(10px); } to { opacity:1; transform:translateY(0); } }
.preset-chip { transition:all .2s; cursor:pointer; user-select:none; }
.preset-chip:hover { background:#dbeafe!important; border-color:#60a5fa!important; }
.preset-chip.active { background:#2563eb!important; color:#fff!important; border-color:#2563eb!important; }

/* Responsive */
@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .md\:flex { display: flex; }
  .md\:hidden { display: none; }
  .md\:p-14 { padding: 3.5rem; }
  .md\:py-10 { padding-top: 2.5rem; padding-bottom: 2.5rem; }
  .md\:text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
  .md\:order-3 { order: 3; }
  .md\:w-\[calc\(50\%-0\.5rem\)\] { width: calc(50% - 0.5rem); }
}